!7

static DynamicVStack buttons;
static Set<JButton> loadedButtons = new HashSet; //= weakIdentityHashSet();

p-subst-autoupdate {
  buttons = showNiceVerticalButtons();
  refresh();
  addButtonsToWindow(buttons, "Refresh", f-thread refresh);
}

svoid refresh {
  if (replaceNiceButtons(buttons, filesForNiceButtons(sortFilesByDate(listPNGFiles(userDesktopDir()))))) {
    centerPackFrame(buttons);
    scrollPaneOnScroll(enclosingScrollPane(buttons), r {
      for (JButton b : (L<JButton>) (L) stackElementsShowing(buttons)) {
        if (add(loadedButtons, b))
          print("Loading: " + identityHashCode(b) + " / " + getText(b));
      }
    });
  }
}